Insert a new column at specified position in a Google Sheet
AI agents use insert_column to create or update resources in Google Sheets MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Google Sheets MCP environment.
This tool modifies spreadsheet structure by inserting a new column, which constitutes a Write operation as it changes data layout reversibly. It is not Destructive because column insertion does not irreversibly erase data. Severity is medium because misuse could corrupt spreadsheet structure or displace existing data, but the effect is typically recoverable through undo or deletion of the inserted column.
From the tool's definition Tool name 'insert_column' and description 'Insert a new column at specified position in a Google Sheet' indicate data modification. The action creates/adds new column structure to a spreadsheet, which is reversible (columns can be deleted).
Documented attack patterns abuse exactly the kind of access insert_column gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google Sheets MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for insert_column:
{
"version": "1",
"default": "deny",
"tools": {
"insert_column": {
"limits": [
{
"counter": "insert_column_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}insert_column stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Insert a new column at specified position in a Google Sheet. It is categorised as a Write tool in the Google Sheets MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Google Sheets MCP server in PolicyLayer and add a rule for insert_column: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Google Sheets MCP. Nothing to install.
insert_column is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the insert_column rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for insert_column. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
insert_column is provided by the Google Sheets MCP server (mkummer225/google-sheets-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Google Sheets MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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15 Google Sheets MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.